If you are comfortable with the relative performance of all the different weaponry, and use basic common sense tactics, you will normally find the AI very easy to beat. It can vary; occasionally it can surprise you.
There are some things you can do to make adjustments, but adjustments is all they are.
For example, in the game Options, You play on Hero while the AI on Recruit. Also, change the AI Difficulty settings to unrealistic (switch them all on). The AI will still be a poor tactician, but it will make them behave a bit harder.
You can try modes of game play. One is to accept your deployment as given to you by the game at the start of a battle. Your Units will be all over the place. Start the battle from there! Or (or as well as), never issue a Fire Command (except for indirect fire weapons such as Mortars), just manouevre. Use the Ambush and Defend Commands to change the posture of any Unit/Team, but let them do the firing. They will, but maybe not exactly as you would do or want.
For a truly aggressive and Brutal AI match, then there is none tougher (that I know of) than CCIV and the VetBOB Mod. Play as Germans against the AI. If you can Blitzkreig your way through that, I will take my hat off to you...
< Message edited by vonB -- 7/10/2010 1:22:34 AM >